7.16 Using an app or the Web on a smartphone. The Nielsen Company reports that U.S. residents aged 18 to. 34 years spend an average of 2.83 hours per day using an app or the Web on a smartphone.15 You wonder if this it true for students at your large university because you rarely see students not using their smartphones. You collect an SRS of n = 75 students and obtain = 3.17 hours with s = 1.36 hours. %3D %3D

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7.16 Using an app or the Web on a smartphone. The
Nielsen Company reports that U.S. residents aged 18 to.
34 years spend an average of 2.83 hours per day using
an app or the Web on a smartphone. You wonder if
this it true for students at your large university because
you rarely see students not using their smartphones. You
collect an SRS of n = 75 students and obtain = 3.17
hours with s=1.36 hours.
15
Transcribed Image Text:7.16 Using an app or the Web on a smartphone. The Nielsen Company reports that U.S. residents aged 18 to. 34 years spend an average of 2.83 hours per day using an app or the Web on a smartphone. You wonder if this it true for students at your large university because you rarely see students not using their smartphones. You collect an SRS of n = 75 students and obtain = 3.17 hours with s=1.36 hours. 15
(a) Report the 95% confidence interval for µ, the avera
number of hours per month that students at your
university use the Internet on a computer.
(b) Use this interval to test whether the average time fo
students at your university is different from the averag
reported by Nielsen. Use the 5% significance level.
Summarize your results.
Transcribed Image Text:(a) Report the 95% confidence interval for µ, the avera number of hours per month that students at your university use the Internet on a computer. (b) Use this interval to test whether the average time fo students at your university is different from the averag reported by Nielsen. Use the 5% significance level. Summarize your results.
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